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Welcome to First Stop Marine, Your one stop shop for all of your boating needs and more!

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Collection: Marine Plumbing & Ventilation - Thru-Hull Fittings

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1st Class Eligible (37 products)
Brand_Attwood Marine (12 products)
Brand_Forespar Performance Products (3 products)
Brand_GROCO (53 products)
Brand_Perko (30 products)
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Marine Plumbing & Ventilation (98 products)
Marine Plumbing & Ventilation | Thru-Hull Fittings (98 products)
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98 products

GROCO 3/4" 90 Degree Hose Thru-Hull Fitting [HTHC-750-S]

Sale

GROCO 3/4" 90 Degree Hose Thru-Hull Fitting [HTHC-750-S]

Vendor:
GROCO

Regular price $41.99 USD

Regular price ~~$55.00 USD~~ Sale price $41.99 USD
Unit price per

Sale
GROCO 1" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-1000-W]

Sale

GROCO 1" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-1000-W]

Vendor:
GROCO

Regular price $24.99 USD

Regular price ~~$33.00 USD~~ Sale price $24.99 USD
Unit price per

Sale
Perko 1/2" Thru-Hull Fitting w/Pipe Thread Bronze MADE IN THE USA [0322DP4PLB]

Sale

Perko 1/2" Thru-Hull Fitting w/Pipe Thread Bronze MADE IN THE USA [0322DP4PLB]

Vendor:
Perko

Regular price $32.99 USD

Regular price ~~$51.96 USD~~ Sale price $32.99 USD
Unit price per

Sale
Perko 1-1/8" Thru-Hull Fitting f/Hose Narrow Flange - Plastic [0301DP6A]

Sale

Perko 1-1/8" Thru-Hull Fitting f/Hose Narrow Flange - Plastic [0301DP6A]

Vendor:
Perko

Regular price $11.99 USD

Regular price ~~$16.76 USD~~ Sale price $11.99 USD
Unit price per

Sale
Perko 1" Thru-Hull Fitting f/ Hose Plastic MADE IN THE USA [0328DP6]

Sale

Perko 1" Thru-Hull Fitting f/ Hose Plastic MADE IN THE USA [0328DP6]

Vendor:
Perko

Regular price $4.99 USD

Regular price ~~$16.19 USD~~ Sale price $4.99 USD
Unit price per

Sale
GROCO 3/4" Bronze Extra Long High Speed Thru-Hull Fitting w/Nut [HSTHXL-750-W]

Sale

GROCO 3/4" Bronze Extra Long High Speed Thru-Hull Fitting w/Nut [HSTHXL-750-W]

Vendor:
GROCO

Regular price $29.99 USD

Regular price ~~$40.00 USD~~ Sale price $29.99 USD
Unit price per

Sale
GROCO 1-1/4" Bronze Combo Scoop Thru-Hull w/Nut [STH-1250-W]

Sale

GROCO 1-1/4" Bronze Combo Scoop Thru-Hull w/Nut [STH-1250-W]

Vendor:
GROCO

Regular price $64.99 USD

Regular price ~~$86.00 USD~~ Sale price $64.99 USD
Unit price per

Sale
GROCO 1-1/2" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-1500-WS]

Sale

GROCO 1-1/2" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-1500-WS]

Vendor:
GROCO

Regular price $59.99 USD

Regular price ~~$79.00 USD~~ Sale price $59.99 USD
Unit price per

Sale
Forespar Pro Series Valve Stainless Steel Capped Thru-Hull Fits 1-1/2"-2" [930003SS]

Sale

Forespar Pro Series Valve Stainless Steel Capped Thru-Hull Fits 1-1/2"-2" [930003SS]

Vendor:
Forespar Performance Products

Regular price $18.99 USD

Regular price ~~$19.99 USD~~ Sale price $18.99 USD
Unit price per

Sale
Forespar Pro Series Valve Stainless Steel Capped Thru-Hull Fits 1"-1-1/4" [930002SS]

Sale

Forespar Pro Series Valve Stainless Steel Capped Thru-Hull Fits 1"-1-1/4" [930002SS]

Vendor:
Forespar Performance Products

Regular price $16.99 USD

Regular price ~~$19.99 USD~~ Sale price $16.99 USD
Unit price per

Sale
Attwood Stainless Steel Thru-Hull Short Straight Barbed - 1-1/2" Inner Diameter [66545-3]

Sale

Attwood Stainless Steel Thru-Hull Short Straight Barbed - 1-1/2" Inner Diameter [66545-3]

Vendor:
Attwood Marine

Regular price $52.99 USD

Regular price ~~$61.99 USD~~ Sale price $52.99 USD
Unit price per

Sale
GROCO 1/2" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-500-WS]

Sale

GROCO 1/2" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-500-WS]

Vendor:
GROCO

Regular price $16.99 USD

Regular price ~~$22.00 USD~~ Sale price $16.99 USD
Unit price per

Sale
GROCO Bronze Hose Barb Thru-Hull Fitting - 1/2" [HTH-500]

Sale

GROCO Bronze Hose Barb Thru-Hull Fitting - 1/2" [HTH-500]

Vendor:
GROCO

Regular price $15.99 USD

Regular price ~~$21.00 USD~~ Sale price $15.99 USD
Unit price per

Sale
GROCO 2" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-2000-W]

Sale

GROCO 2" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-2000-W]

Vendor:
GROCO

Regular price $92.99 USD

Regular price ~~$124.00 USD~~ Sale price $92.99 USD
Unit price per

Sale
Attwood Plastic Thru-Hull Fitting - 1-1/2" - White [3875-3]

Sale

Attwood Plastic Thru-Hull Fitting - 1-1/2" - White [3875-3]

Vendor:
Attwood Marine

Regular price $9.99 USD

Regular price ~~$10.99 USD~~ Sale price $9.99 USD
Unit price per

Sale
GROCO 3/4" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-750-WS]

Sale

GROCO 3/4" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-750-WS]

Vendor:
GROCO

Regular price $15.99 USD

Regular price ~~$21.00 USD~~ Sale price $15.99 USD
Unit price per

Sale
Perko 2" Thru-Hull Fitting w/Pipe Thread Bronze MADE IN THE USA [0322009PLB]

Sale

Perko 2" Thru-Hull Fitting w/Pipe Thread Bronze MADE IN THE USA [0322009PLB]

Vendor:
Perko

Regular price $103.99 USD

Regular price ~~$209.01 USD~~ Sale price $103.99 USD
Unit price per

Sale
Perko 5" x 3-1/4" Scoop Strainer Bronze MADE IN THE USA [0066DP2PLB]

Sale

Perko 5" x 3-1/4" Scoop Strainer Bronze MADE IN THE USA [0066DP2PLB]

Vendor:
Perko

Regular price $38.99 USD

Regular price ~~$62.16 USD~~ Sale price $38.99 USD
Unit price per

Sale
Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 3/4" Inner Diameter [66547-3]

Sale

Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 3/4" Inner Diameter [66547-3]

Vendor:
Attwood Marine

Regular price $26.99 USD

Regular price ~~$30.39 USD~~ Sale price $26.99 USD
Unit price per

Sale
GROCO 3/4" Bronze High Speed Thru-Hull Fitting w/Nut [HSTH-750-W]

Sale

GROCO 3/4" Bronze High Speed Thru-Hull Fitting w/Nut [HSTH-750-W]

Vendor:
GROCO

Regular price $16.99 USD

Regular price ~~$22.00 USD~~ Sale price $16.99 USD
Unit price per

Sale
GROCO 2-1/2" Bronze Thru-Hull Fitting w/Nut [TH-2500-W]

Sale

GROCO 2-1/2" Bronze Thru-Hull Fitting w/Nut [TH-2500-W]

Vendor:
GROCO

Regular price $163.99 USD

Regular price ~~$218.00 USD~~ Sale price $163.99 USD
Unit price per

Sale
Attwood Stainless Steel Thru-Hull Short Straight Barbed - 1" Inner Diameter [66542-3]

Sale

Attwood Stainless Steel Thru-Hull Short Straight Barbed - 1" Inner Diameter [66542-3]

Vendor:
Attwood Marine

Regular price $29.99 USD

Regular price ~~$35.16 USD~~ Sale price $29.99 USD
Unit price per

Sale
GROCO 1/2" Bronze Combo Scoop Thru-Hull w/Nut [STH-500-W]

Sale

GROCO 1/2" Bronze Combo Scoop Thru-Hull w/Nut [STH-500-W]

Vendor:
GROCO

Regular price $26.99 USD

Regular price ~~$35.00 USD~~ Sale price $26.99 USD
Unit price per

Sale
Perko 1" Thru-Hull Fitting f/Hose Bronze MADE IN THE USA [0350006DPP]

Sale

Perko 1" Thru-Hull Fitting f/Hose Bronze MADE IN THE USA [0350006DPP]

Vendor:
Perko

Regular price $52.99 USD

Regular price ~~$88.08 USD~~ Sale price $52.99 USD
Unit price per

Sale

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